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Claims made by Hisashi Moriguchi — a visiting researcher at the University of Tokyo — about using modified stem cells to successfully treat a patient with terminal heart failure could be false, reports Nature News.

According to the article, Moriguchi says he had invented a method of reprogramming induced pluripotent stem cells using two chemicals. He also claimed that the iPS cells could be differentiated using a "supercooling method" that he invented.